Improvement in power punching-presses



E. L. GAYLORD. POWER PUNc'H'IN'G-PRESS.

,Patented Jui`y1'1, 187s.

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WJTJVESSES ,MLV I M Hy Attorney/,y

EDWARD L. GAYLORD, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO J OHN S.FOLLANSBEE, OF SAME PLACE.

IMPROVEMENT IN POWER PUNCHlNG-PRESSES.

Specification forming part of Letters Patent No. 179,7l, dated July 11,187,6; application iiled February 10, 1876.

To all 'whom it may concern:

Be it known that I, EDWARD L. GAYLORD, of Bridgeport, in the county ofFaireld, and in the State of'Oonnecticut, have invented certain new anduseful Improvements in Power Punching-Presses 5 and dohereby declarethat the following isa full, clear, and exact description thereof,reference being had to the accompanying drawing, and to the letters ofreference marked thereon, making a part of this specification.

In the ordinary pitmen for power-presses, when it is desired to adjustthe pitman to dit'- ferent dies, &c., it has to be made longer-orshorter, which is usually accomplished by the insertion of washers ofvarying thickness, and at last pieces of paper are inserted to get anaccurate adjustment. A* This requires considerable time, and is also avery diiicult and tedious proceeding.

The object of my invention is to obvia-te this difficulty, and to renderthe pitman capable of being adjusted accurately and quickly. To this endthe nature ot' my invention consists in the introduction .between thesections of a two-part pitman, that are held together by a screw, and inthe manner hereinafter described, of a wedge with a device for forcingit in or withdrawing it, thereby making the pitman longer or shorter, asmay be required. My invention further consists in combining a verticalpin with such pitman and the ordinary washer, to prevent the washer fromturning around, all as hereinafter more fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figurelis a side elevation of a power-press pitman embodying myinvention. Fig. 2 is a longitudinal section of the same. Fig. 3 is aplan view of the wedge, and Fig. 4 is a plan view of the washer used inthe pitman.

A represents the upper, and B the lower, part of a pitman forpower-presses. Longi- .tudinally through the upper part A is bored ahole for the passage of the screw C, which screws into the top of thelower part B, the

head of the screw resting on a shoulder, a, in the hole bored throughthe upper part A. 'Ilie screw C has a longitudinal groove, b, in whichis inserted a feather, d, formed or fastened in the huh of a wheel, D,placed around thescrew between the two parts-A and B.

By turning this wheel D the screw C is roing a loose pin, h, is insertedin a hole in the bottom of the top part A, which pin falls of its owngravity through the slot e in the washer onto the wheel, so that thewasher is, in a measure, held in position and kept from turning when thewheel is turned. The top of the lower part B of the pitman is formedwith an elongated tenon, m, and an inclined shoulder, a, on each sidethereof, and on this tenen is placed a wedge,G, having a central slot,as shown in Fig. for the passage ofthe tenon m.l rIhis wedge takes upthe space between the inclined shoulders n 'n and the bottom side of thewheel D. In the large end of the wedge G is a slot, in which is laid aflanged screw, H, which screws into the tenon m for adjusting the wedge.

In operation, one or more washers, E, are Iirst used, as required, andthen to make the final nice adjustment the wedge is moved out or in, asrequired, by means of its screw H, and the part-s held firmly by turningthe wheel D to tighten the screw U.

My invention is equally adapted to a rightand-left screw as to the screwC shown.

Having thus fully described my invention, what I-claim as new, anddesire to secure by Letters Patent, is-

1. rIhe combination of the parts A B, the vertical headedconnecting-screw C, andthe slotted wedge G, provided with adjustingscrewH, all substantially as and for the purposes herein set forth.

2. The combination ofthe pitman A B, made in two parts, as described,the screw C, feathv 2' lesuren ered Wheel D, the wedge G, withregulatingA ln testimony that l claim the foregoing I screw H, and theinclined shoulders n n and have hereunto set my hand this 2d day oftenon m, formed ou the part B ot the pitman, l February, 1876. allsubstantially as and for the purposes herel in set forth.

3. The combination of the loose pin h, inserted in the pmt A of thepitman, the slotted Witnesses: Washer E, and Wheel D, as and for thepur- I WM. E. DISBROW,

poses herein set forth. C. H. NEWTON.

E, L. GAYLORD.

